Quarterly report pursuant to Section 13 or 15(d)

Commitments and Contingencies Commitments and Contingencies (Details)

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Commitments and Contingencies Commitments and Contingencies (Details) - USD ($)
1 Months Ended
Mar. 10, 2020
Mar. 31, 2020
Sep. 30, 2018
Jan. 30, 2020
Sep. 01, 2011
Loss Contingencies [Line Items]          
Loss contingency, amount of damages sought     $ 1,000,000    
Loss contingency, amount of damages awarded $ 475,000 $ 485,000      
Gain contingency, unrecorded amount   196,000      
Grove Economic Development Authority Tax Increment Revenue Note | Harbor Pointe Associates, LLC | Notes Payable, Other Payables | Guarantor Subsidiaries | Grove Economic Development Authority          
Loss Contingencies [Line Items]          
Debt issued         $ 2,420,000.00
Number of semi-annual payment installments         50
Guarantor obligations, maximum exposure amount         $ 2,230,000
Amounts accrued for guarantor obligations   $ 0      
Minimum | Grove Economic Development Authority Tax Increment Revenue Note | Harbor Pointe Associates, LLC | Notes Payable, Other Payables | Guarantor Subsidiaries | Grove Economic Development Authority          
Loss Contingencies [Line Items]          
Debt instrument, interest rate. stated percentage         2.29%
Maximum | Grove Economic Development Authority Tax Increment Revenue Note | Harbor Pointe Associates, LLC | Notes Payable, Other Payables | Guarantor Subsidiaries | Grove Economic Development Authority          
Loss Contingencies [Line Items]          
Debt instrument, interest rate. stated percentage         14.00%
Guarantee of Indebtedness of Others          
Loss Contingencies [Line Items]          
Loss contingency, amount of damages sought     $ 150,000    
Northeast          
Loss Contingencies [Line Items]          
Percentage accounted by properties of its annualized base rent   4.00%      
Mid Atlantic          
Loss Contingencies [Line Items]          
Percentage accounted by properties of its annualized base rent   35.00%      
Southeast          
Loss Contingencies [Line Items]          
Percentage accounted by properties of its annualized base rent   61.00%      
Land and land improvements | Construction Loan | Affiliated Entity          
Loss Contingencies [Line Items]          
Credit bid purchase approved by the bankruptcy court       $ 200,000  
Land and land improvements | Construction Loan | Affiliated Entity | BOKF's          
Loss Contingencies [Line Items]          
Credit bid purchase approved by the bankruptcy court       $ 18,750,000